Boxă compactă
When listening, there is a superior rendering of detail and performance at the lowest listening levels, minimums that contribute greatly to the performance and ambience reconstruction of the recording. Two particular measurements, developed in-house both as software and hardware, allowed us to precisely quantify this improvement throughout the reasonably useful range, that is, from the mid-low to the high range. Once the dimensions were established, we measured the changes in acceleration of the side walls, obtaining, among other things, the pressure emitted by these, pressure that would otherwise not be measurable.

The action at the points of greatest stress has been further reduced with much smaller internal reinforcements than in the past, avoiding additional colouring, which is often a far worse cure than the illness to be cured. The two walls, the upper and lower, have been made with special attention to their relative angles so as to interfere with each other as little as possible. The lower wall has also been made slightly angled.

Obviously, as is our well-established custom, we have appropriately milled the speaker passage hole internally in order to minimise the acoustic tunnel effects that would otherwise be created in the midrange. The rear connectors are designed to offer maximum versatility in cable connection.

The 18 cm woofer used in this model represented a remarkable and constructive collaboration with Scan Speak. It was carefully screened mainly in the listening room, before being measured and technically verified. To an extremely generous excursion it adds a remarkable dynamic linearity thanks to the special design of the polar terminations and the considerable force factor. The horizontal dispersion has been carefully evaluated on the basis of in-room listening and the design of the recreated scene, an absolute priority for us. The load chosen is a bass reflex, optimised to obtain a well-damped performance and a reasonable extension without the listening should suffer in terms of performance and continuity of the harmonics of natural instruments.

The apparent simplicity of this low pass lies in the work done upstream about the absence of colouration and resonances. The high-pass for the tweeter must ensure sufficient thermal stability for its voice coil and has to deal with listening performance even when the volume is very high. An in-house study allowed us to establish a correct procedure for defining the minimum crossover frequency before even the slightest change in timbre was noticeable at high levels. The high pass not only regulates the levels of timbre continuity between woofer and tweeter, but also carefully adjusts the damping of the response and consequently the acoustic phase of the transducer in the vicinity of the crossover frequency.

The instrumental performance, placed slightly in the background compared to the listening performance, confirmed both the remarkable construction characteristics in terms of cleanliness and linearity and the goodness of the choices made in the design.

The speaker's average sensitivity is 90 dB, measured with 2.83 vrms at the terminals, with the microphone positioned one metre away. The low range response appears well damped and devoid of any emphasis, according to the desired tuning conditions. The chosen crossover frequency, about 2500 Hz, does not present any particularities in off-axis measurements, maintaining a trend of the two acoustic phases practically equal to the trend on the axis. The impedance module does not drop below 3.8 ohms, maintaining a phase trend that at most drops to -45° so that the nominal load of 6 ohms is also sustainable by valve amplifiers.

Distortion appears low and shows no particular variations as the input level increases. Our particular measurement of articulation shows no particular variations between 85 and 95 dB average pressure. Thanks to these characteristics, we can say with some pride that the timbre of the loudspeaker and its characteristics of soundstage and articulation change very little as the input power increases, even noticeably.

Type: Two-way, Bass-Reflex, Bookshelf Speaker
Tweeter: 26 mm Soft Dome Tweeter, Double Ferrite Magnet, Alu Frontplate
Mid/Woofer: 180 mm Black anodized Alu Cone, Ferrite Magnet
Sensitivity (2.83 V / 1 m): 90 dB
Frequency response (-3 dB): 50 Hz - 21,000 kHz
Nominal impedance: 6
Minimun impedance: 3.8
Maximun power: 100 W without clipping
Recommanded amplifier power: 25 - 100 W
Crossover frequenciency: 2500 Hz
Dimension (Cabinet only, without stand): 237 x 428 x 390 mm
Dimension (Complete loudspeaker, with stand): 312 x 1162 x 449 mm


Denumiri similare la Boxe audio Opera Prima V2: Prima V 2, PrimaV2